Flash remover



Sept. 23, 1941 D. s. HARDER FLASH REMOVER Original Filed July 22, 1959 6 Sheets-Sheet l J l M l--- mm @o m# www l :wmzl n m J M y l w m Jlll j W ,.IJP III H w HHIIJIFIHM W .uw II H, bw. w .w w@ xk Q w QWIIK uw. M l I @N |I ...idw -Hllfl f@ a MM m n m H hn mh D. S. HARDER FLASH REMOVER Sept. 23, 1941.

Original Filed July 22, 1959 6 Sheets-Sheet 2 sept- 23, 1941- D. s. HARDER 6 She Original Filed July 22, 1959 @aA/nw: www

Sept' 23, 1941- n D. s. HARDER l 2,256,559

FLASH REMovER Original Filed July 22, 1939 6 Sheets-Sheet 4 Sept 23, 1941- D. s. HARDER 2,256,559

FLASH REMOVER Original Filed July 22, 1939 6 Sheets-Sheet 6 y INVENTOR. 054 7W/P J. #wwf/9.

Patented Sept. 23, 1941 UNITED STATES/PATENT OFFICE FLASH BEMOVER Delmar s. Harder. Detroit, Mich., assignor to General Motors Corporation, Detroit, Mich., a corporation of Delaware Original application July 22, 1939, Serial No.

Divided and this application August 14, 1940, Serial No. 352,501

4 Claims.

Athere is not much of a problem in propelling the' work through the machine 'as tubes are usually vise jaw is provided with a roller 4 at its forward end. This roller (as shown in 1) strikes the cam .which serves to open the jaws. Ordinarily, the jaws are closed by a strong spring 6.

The workman pushes the' work W along the longitudinal rack bars in between the jaws until the roller 4 drops off the end of the cam 5.

' Thereupon, the two jaws, one on each chain, grip the work and pull it tothe right. The work adjacent the burr or ash is wiped by the soft brushes 'l which remove any chips or dirt so that forced through'the Welder or other machine by a suitable arrangement of rolls. Where flat pieces of work and especially irregular pieces of work are to be passed through a machine' for removing the burr or ilash, more of a problem is presented in the way of handling the work.

This machine can be used for any kind of flash or burr removing but is intended primarily for handling pieces of metal that are welded together in salvage operations to make a piece of metal of suflicient size to be used for certain purposes.

In the drawings:

Figs. 1 and 2 constitute one side view of the apparatus laid out on two sheets of the drawings, Fig. 1 being a side elevation of the front part of the machine and Fig. 2 a side elevation of the rear part of the machine.

Fig. 3 is an end elevation showing some of the parts in section. l

Fig. 4 is a section taken on the line l-l of Fis. 1.

Fig. 5 is a section taken on the line 5-5 of Fig. 3.

Fig. 6 is a detail of a device for releasing the work from the lower jaw.

Fig. 7 is a. view of a rectangular piece of work showing how the vises grip work with a seam perpendicular to the end of the work. i

Fig. 8 is a similar view showing how the vises handle a piece of work where the welding seam .is not perpendicular to the end of the work.

Fig. 9 is a detail section taken on the line 9-9 of Fig. 6 showing how the shoe bends the work slightly in the middle. l

Fig. 10 is a View of the drive sprocket shaft showing the adjustable connection between the flange and the sprocket, the same being a sectional view taken on the line III- I9 of Fig. 2.

Referring to Fig. 1: W is the work. This is supported on a rack made of tubes. There are four vof these longitudinal tubes designated I (Fig. 3).

There are two continuous conveyor chains 2. Each chain has several vises 3. The vise'is prothe same" will not pass in between the gripping rolls. These gripping rolls are also wiped by the felt pads 8 so as to keep them clean. If the work cannot be kept clean, these pressure rolls will press the chips or other foreign particles into the face of the sheets and injure them.

A motor M has a driving pinion 9 which drives gear I0 which meshes with the upper gear II. These two gears, in turn, drive the shafts which carrythe pressure rolls and the milling cutters. Referring to Fig. 4, which is a section looking upwardly, through the top set of driving connections, it will be seen that gear I I is mounted on a shaft I2 which has a flange I3 at its end which is bolted to the gear I4. The gear Il is journaled on a ball bearing I5 carried on the end of the stationary shaft I5. The gear I4 meshes with gear I6 which is keyed to the end of shaft I1.

Shaft I1 is provided with a conical recess I8 in lwhich is tted the conical end I9 of shaft 2|).

These two shafts may be pulled together in interlocking relationship by means of the bolt 2I. The .large shaft I1 is accurately journaled in the ball bearings 22. The smaller shaft 29 has its reduced' end journaled in the ball bearings 23.

Secured on the shaft 20 by jamb nut 24 and4 shoulder 25-are the ball bearings 26. The ball bearings freely support the pressure rollers 21 so 40 that these can rotate independently of the shaft and have no propulsive effect on the work which is being driven through by the conveyor chains. The milling cutter 28, however, is connected to the drive shaft 20 by a key 29. A similar arrangement is provided for the lower roller set. The milling cutters and pressure rolls, both the upper and lower, are each adjustable as a unit, angularly about the stationary shafts I6. The large shafts I1 and the ball bearings are housed in the casing 30. This leasing 35 has arms 3| which carry the pivotspin 32. An eye-bolt 33 is pivoted to the lugs by the pivot pin 32. 'Ihis bolt passes up through the two brackets 34 and 35 which are stationary parts of the machine. This vided with teeth at its rear end and the upper eye-bolt has apair of nuts 36 on the upper end and nuts 31 between the two brackets, one in each set being a jamb nut and the other an adjusting nut. A spring 38 bears against the upper bracket 35 and the lower set of nuts and tends to press the rolls and milling cutter yieldingly against the work. The milling cutter is slightly less in diameter than the rolls, so that the surface of the work outside the ash area is not injured by the cutter. The lower set of rolls is similarly pivoted to swing on the lower stationary shaft i6 and the arrangement is the same here except the eye-bolt 39 is xedly adjusted in the lower' bracket 40 because only one roll and cutter set has to be yieldable.

It will be apparent from the above arrangement that the .spacing of the pressure roll and milling cutter setsmay be varied with great nicety to accommodate sheets of varying thickness. It will also be apparent that with one roll andy cutter set being xedly adjustable and the other set yieldable toward the rst set, continuous and uniform pressure is applied to the work. Irregularities in the surface of the work are compensated for by the yieldable roll and cutter set. A pipe 4| has a iiared mouth adjacent the upper milling cutter. 4This is connected with a vacuum f -tank 42 known in the trade as the Hercules ta 'This gives a powerful suction near the point where the milling cutters meet forthe pur- `pose'of drawing the chips away from the metal so that they will not be drawn in between the pressure rolls. A large tube 43 has a ared mouth below the work and adjacent the point where the milling cutters meet for the purpose of conveying the chips into the bin 44.

The chain may be adjusted by means of the screw 45' which can bodily move the left hand sprocket 46. The sprocket at the rightfend o1' the conveyor line is designated 41 and this has arcuate slots 48 through which pass bolts -49 which are threaded into the ange 50 on the sprocket driving shaft I. This. shaft is, in turn, driven by sprocket chain 53 which is connected with a pinion 54 which is connected with a gear reduction housing 55 in which the gearing (not shown) is ultimately driven by the motor M1.

The vises are opened by means of a cam 5B at the rear end of the machine. Inasmuch as the lower vise jaw has sharp teeth that embed themselves in the metal, the metal may not free itself from these teeth. Hence, the weighted lever 51 carried on the weighted lever and this lever may swing against the resistance of the weight in case the metal .does not. at once free itself from the teeth of the lower jaw.

After the cam and the roll on the end of the weighted lever free the work sheet from the vise, the Work sheet is carried through the machine supported on the tubes and, when the next vise comes along, the end abutting the rear end of the sheet carries it through.

I nd it desirable to tension the sheet slightly as itleaves the rolls. This is accomplished by the shoe 59 which presses on the sheet down between the two supporting tubes (as shown in Fig. 9). This gives a drag to the sheet so that, when the cam opens the vises, the vises should pull away Yfrom the sheet. l

Iv claim: Y 1. In a machine for removing the burr or ash from welded metal sheets, a milling cutter and roll set comprising a shaft on which a pair of rolls are journaled to rotate freely and a milling cutter keyed to the shaft between the rolls.

2.- In a machine for removing the burr or flash from welded metal sheets, a milling cutter land roll set comprising a shaft on which a pair of rolls are journaled to rotate freely, a milling cutter keyed to the shaft between the rolls, and a swinging unit on which the roll and cutter set may be adjusted toward and away from the work.

3. In a machine for removing the burr or flash from welded metal sheets, a milling cutter and (Fig. 6) is provided which has a roll 58 on its end that projects into the path of the sheet and, when the sheet strikes this roll, it tends to lift th'e sheet. The roll is, however, not absolutely I iized so as to cause injury or jambing as it is roll set comprising a shaft on which a pair of rolls are journaled to rotate freely, a milling cutter keyed to the shaft between the rolls, a swinging unit on which the roll and cutter set may be adjusted toward and away from the work and a bracket through which a bolt passes for makingsaid adjustment.

4. In a machine for removing theburr or flash from welded metal sheets, a milling cutter and 'roll set comprising a shaft on which a pair of rolls Lare journaled to rotate freely and a milling cutter keyed to the shaft between the rolls, a. swinging unit on which the roll andcutterset may be adjusted toward and -away from the work. a bracket through which the bolt with nuts threaded thereon passes for making said adjustment and a spring cooperating with said bracket and said nuts on the said bolt, the same adjusting the roll and cutter set with respect to the thickness of the metal but permitting the same to yield.

DELMAR S. HARDER. 

